I am not good at imagining things, but i still enjoy it. You can go creative and build a very detailed house, survival, trying to make some goals for yourself, some really big ones.
I currently have a goal, i started over 2 months ago. It was building a big castle+town. I am not even close to finished.
Also in multiplayer - if you are not creative at all - There are minigames. Hide and seek, trouble in mineville, blockparty, survival games, all kinds of game you easily can spend hours upon hours on.